1) Operating temperature: The inverter is a high-power electronic component, which is simply affected by the operating temperature, and the general temperature requirement is 0 - 55. However, in order to ensure the safety and reliability of the operation, it is necessary to consider freeing up space when using, and it is best to control it below 40. The inverter generally needs to be installed at the top of the control box, which is strictly in accordance with the device requirements in the product manual, and it is definitely not allowed to install heating elements or components that are easy to heat at the bottom of the inverter.
2) Ambient temperature: When the temperature is too high and the temperature changes greatly, the inside of the inverter is simply exposed, resulting in a significant decrease in the insulation function or a short circuit accident. If necessary, put desiccant and heater in the box.
3) Corrosive gas: The high concentration of corrosive gas in the application environment will not only corrode the wires and circuit boards of the components, but also accelerate the aging of plastic components and reduce the insulation function. In this case, the control box should be ventilated in a sealed structure.
4). Vibration and impact: When the control cabinet equipped with the inverter is impacted by mechanical oscillation, the electrical contact is poor. In this case, it is not only necessary to improve the mechanical strength of the control cabinet and keep it away from the source of oscillation and impact, but also to use the shock-resistant rubber mat of the oscillating components (such as the electromagnetic switch on the surface of the control cabinet). Inspect and repair the equipment after a period of use.
Electrical Environment:
1) Avoid electromagnetic disturbance. When in use, due to rectification, frequency conversion and other reasons, a large number of disturbing electromagnetic waves will be presented around the inverter, which will cause a certain degree of disturbance to the adjacent equipment. For this reason, it is necessary to use a metal shell for the exterior and electronic system in the cabinet to avoid disturbance by the external appearance of the inverter. It is necessary for all parts to be firmly grounded. In addition, it is necessary to use shielded control cables for the connection between electrical components, appearance, and appearance, and the shielding layer must be grounded. Faulty handling of electromagnetic disturbances can lead to the failure of the entire system and the failure or damage of the control unit.
2) Avoid excessive input pressure. The input power of the inverter is generally overvoltage maintained. However, a long duration of the input voltage may damage the input of the inverter. Therefore, in practical use, it is necessary to verify the input voltage, single-phase, three-phase and rated voltage of the inverter. In particular, if the supply voltage is very unstable, it is necessary to install a stabilizer. Failure to do so will have serious consequences.
Properly grounded inverters improve system sensitivity and suppress noise. The smaller the E(G), the better the ground resistance. The cross-sectional area of the ground wire shall not be less than 2mm2, and the length shall not be less than 20 meters. The shield of the input wire should be connected to E(G) and the other end of the shield should not be aligned with the ground. Otherwise, the signal will change and the system may vibrate. The electrical connection between the inverter and the control box is required. If the practical device is difficult, copper wire jumpers can be used.
Lightning protection measures:
The lightning protection absorption net is generally installed on the inverter, mainly to avoid the damage of instantaneous lightning strikes to the inverter. However, in practice, especially when the power line is introduced into the overhead, it is difficult to meet the requirements by relying on the absorption network of the inverter alone. This issue is especially important in the local area of Lightning. If the power supply is an overhead input line, a special lightning arrester for frequency conversion is installed on the input line, or a steel pipe is buried 20 meters away from the frequency converter for special grounding maintenance. When the power cord is introduced, a lightning protection system is installed in the control room to prevent lightning strikes from entering the equipment. Practical use has proved that this method can effectively deal with lightning strike problems.
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Sunland inverters are designed for environmental requirements
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